Capacitive Touch Switch | Membrane Keypads | Sealed Keyboards-SblIndia

We at SBL consider ourselves to be a “Solutions” driven company rather than being a sales-oriented company. We are more keen to offer a solution to the customer rather than just run after orders. We believe in solving the problems faced by our customers with respect to the keyboard panels they use or require. 

As a result of this policy, we are the First Choice for Indian as well as MNCs to develop and supply Sealed Keyboard Panels. Companies like GE Healthcare, Larsen & Toubro, Siemens, HUL, Moog Motion Controls, ECIL, Tata Power SED, Medha Servo, etc., have benefitted immensely over the last 10-15 years by developing their keyboard requirements with us. 

We offer a wide range of Switch Technologies from which the customer can choose to suit their application and use. Listed below are some examples where customers have not only been able to take advantage of the technical features offered, but have also been able to reduce their Bill of Materials for these products.

About Products :

Metal Keyboards:

Metal Keyboards

 Metal Keyboards are made using stainless steel material or aluminum which makes them very tough and can be used in very harsh environments. The switch elements are embedded inside the stainless steel or aluminium due to which they are completely protected from any external abuse. Thus these are also termed as vandal proof keyboards.

Industry :

Railways, Security Systems, Oil & Gas, etc.


Locomotive Controls, Access Controls, Oil Exploration Equipment, Gas/Petrol or Diesel Dispensing Machines (Petrol Pumps), etc.

Technology :

There are two types of technologies that are offered in these keyboards.

Piezo Sensing Switches:

 The pressure applied by the SS or Aluminium on the piezo sensor generates a voltage pulse which is sensed by an electronic circuit and used as a signal. SBL is a pioneer in developing this technology in India and has applied to patent the same.

Using a snap dome gold contact: Metal caps are placed on top of a silicon sheet which can activate the snap dome switch on a gold plated PCB. This entire assembly is embedded inside a SS plate to seal it and thus keep out dust, moisture, humidity, etc.


Metal Keyboards can be used in all types of environments especially where the equipment of keyboards are exposed to the atmosphere. The piezo sensing switches are a solid state in nature and hence can last a lifetime. These type of metal keyboards are already being used successfully in Diesel locomotives by Indian Railways for than 6 years now. Metal keyboard using a snap dome gold contact can also offer high protection and long life, besides offering a tactile feedback and backlighting. These are ideal for use in external areas and are able to withstand.

Silicon Rubber Keyboard:

Silicon Rubber Keywords

These keyboards are similar to Snap Dome Switch Keyboards where the snap domes are mounted and sealed on a gold plated PCB to conduct the signals in the keyboard circuit. The main difference is that a silicon layer is used as an overlay in place of the polyester material. The snap dome can also be replaced by having a carbon contact although this would reduce the overall life of the switch. 

Silicon material is extremely inert and is not affected by harsh climatic conditions or by any external materials like solvents, acids, etc. The key operating pressure can also be adjusted by changing the shore hardness of the silicon used. 

Silicon can be moulded in to any shape and size as per requirements. It can also offer a variety of colours to add to the aesthetics of the keyboard. As silicon is translucent in its basic form, it can be used to make illuminated keyboards.




Energy resources worldwide are depleting at the very high rate and energy conservation is becoming the norm of the day. With stricter energy consumption norms worldwide Energy Efficient Motors are manufactured in IEE efficiency classes (I, II, III) as per customer requirement.

Energy efficient motors, also called premium or high- efficiency motors, are 2 to 8% more efficient than standard motors. Motors qualify as”energy-efficient” if they meet or exceed the efficiency levels listed in the National Electric Manufacturers Association’s (NEMA’s) MG1-1993 publication. Energy efficient motors owe their higher performance to key design improvements and more accurate manufacturing tolerances.

Lengthening the core and using lower-electrical-loss steel, thinner stator laminations, and more copper in the windings reduce electrical losses in Energy efficient motors. Improved bearings and a smaller, more aerodynamic cooling fan further increase efficiency in the design of Energy efficient motors

Energy efficient motors should be considered for all new installations, replacement of failed motors, or as spares. Energy efficient motors are frequently a cost-effective alternative to rewinding

and are sometimes an economic substitute for well-functioning motors in high-duty applications.


RO Plant Manufacturers in India


ro plant manufacturers & suppliers
ro plant manufacturers & suppliers

Reverse osmosis 

The Company Is A Pioneer In The Manufacture Of ETP, STP & WTP Eximious is One Of The Leading Company Across The Globe In Water & waste water Treatment. We have a Proven Track Record In Counsulting, Engineering, Operating And Maintenance Of Water Treatment Plant. We Offer A Complete Range Of Water & Waste Water Treatment Solution Utilizing Innovation And The Latest Equipment & Technologics Across The Wide Spectrum Of Application.

Reverse osmosis is the process of forcing a solvent from a region of high solute concentration through a membrane to a region of low solute concentration by applying a pressure in excess of the osmotic pressure. This is the reverse of the normal osmosis process, which is the natural movement of solvent from an area of low solute concentration, through a membrane, to an area of high solute concentration when no external pressure is applied. The membrane here is semipermeable, meaning it allows the passage of solvent but not of solute.

To illustrate, imagine a semi permeable membrane with fresh water on one side and a concentrated aqueous solution on the other side. If normal osmosis takes place, the fresh water will cross the membrane to dilute the concentrated solution. In reverse osmosis, pressure is exerted on the side with the concentrated solution to force the water molecules across the membrane to the fresh water side.

The membranes used for reverse osmosis systems have a dense polymer barrier layer in which separation takes place. Since Reverse Osmosis does not occur naturally, it must be created by applying pressure to the high solids water in order to force it through the membrane, with pressures from 8 – 14 bar for fresh and brackish water, and 40 – 70 bar for seawater, which has around 24 bar (350 psi) natural osmotic pressure which must be overcome.